Manifold heat control



Dec; 2o, 1932. 1:. F. KlsHLlNE 1,891,768

MANIFOLD HEAT CONTROL Filed Aug. 7, 1930 5 sheets-sheet 1 f ATTORNEYS.

Dec. 20, 1932. F. F. KasHLlNE *1,891,768

MANIFOLD HEAT CONTROL Filed Aug. '7. 1930 3 Sheets-Sheet 2 l INVENTOR ATTORNEYS.

Dec. 20, 1932. F. F. KlsHLlNE 1,891,763

MANIFOLD HEAT CONTROL Filled Aug. 7, 19:50 s sheets-sheet a INVENTOR ATTORNEYS.

Parenred Dec. 2o, 1932 UNITED STATES PATENT OFI-ica FLOYD I. xIsIILINE, or DETROIT, MICHIGAN,A AssIGNOR To GRAHAM-'DAME MOTORS CORPORATION, A CORPORATION or MICHIGAN MANIFOLD HEAT CONTROL Application mea AugustV 7, issaseriai No. 473,705.

This invention relates to manifold heat control devices. i

The main objects 'of this invention are to provide an improved heat control devicefor directing exhaust gases into contact with the intake manifold and thenautomatically'ter- Yminating the flow of gases upon arise in temperature within the intake manifold; to pro-y -vide an improved construction in combination withV a mixture enriching device such ask .a carburetor choke valve, in which the exhaust gases are directed into contact with the intake manifold when the mixture of the car,

buretor is enriched; and to provide animprovedtype of two stage control whereby all of the exhaust gases are directed into contact with theintake manifold when the motor is cold and a portion only of the gases'directed into Contact with the intake manifold when the motorhas warmed up to a certain predetermined point, andl to terminate theV iowfof exhaust gases to the intake manifold when the Vtemperature of the motor further risesto another redetermined point.

` lAn Illustrative embodiment of this invention is shown in the accompanying drawings, inwhich v Fig. 1 is a view in elevation of an internal combustion motor intake and exhaust manifolds and carburetor therefor with mylim? proved heat control mechanism adapted thereto.

Fig. 2 is an enlarged sectional view showing the thermo-responsive unit and locking mechanism operated thereby, the view being taken on the line 2- 2 of Fig. 1, looking in the direction indicated..

A Fig. 3 is` a fragmentary sectional view tak en on the line 3--3 of Fig. 4

looking in the direction indicated.

Fig. 4 is an enlarged vertical longitudinal Y sectional view taken through thermedial part dotted lines.

of the heat control apparatus with fragmen- Y taryl parts shown in sectional detail.

Fig. 5 is an enlarged sectionalview taken on theline 5-5 of Fig. 1, looking in the di-kv rection indicated,sl1owing the' exhaust fga's directing valve in closedfposition in full lines and in open and partially open position in the intake and exhaust manifolds of an in-l ternal combustion motor are connected to,- gether attheir medial points .where the carburetor riser passes into the' intake manifold.- The manifolds are so designed and'arranged as to provide a passageway leading from'ther exhaust'manifold tothe walls ofthe intake manifold and a valve is arranged -in this passageway,'which, when in open position, will cause all of the exhaust gases to pass around and in contact Vwith the intake manifold, and when in closed position will terminate such flow of exhaust gases'. f

The valve for controlling the exhaust gases is-normally urged to 'a closed position by av suitable torsion spring and connectionsl vare provided between the valve and acarburetor mixture enriching device so Vthat when the Thermo-responsive means are-provided for releasing the lock upon a predetermined riseA of temperaturewithin the intake manifold. The arrangement, however,issuch that the valve is closed in a two-,stage operation, that is, when it is first released from a full open position it will be moved to a partially open position, preferably half open `and releasably secured at that point. Upon a further rise in temperature withinithe intake manifold the locking means will again be released so as to permit the torsion spring to fully close the valve. n

In the constructionshown in the' drawings an intake manifold 6 and exhaust manifold .7 are joined together at their medial pointsimvmediately above the riser 8 of a carburetor 9. 'Th'e'exhaust manifold 7 comprises the 'usual v header 10 and branches-11 which conduct the exhaust gases from both ends of the inj ternal combustion motor 12-to`wardv the middle, at which point the gases normally pass 5 pipe 13,- as shown by the arrow. 14 in Fig. 5.

from the'header 1() .directly to an exhaust The exhaust manifold, at this middle point, is provided with a passagewayl which leads: to and communicates with a passagewayv 16 vwhich passes down around onel sideof the extending fin or partition 2O respectively.

-31 to the protruding end 32 intake manifold 6 and communicates with horizontally disposed passageways 17 formed at each side of the riser 8. The passageways 17 communicate with a passageway 18 at thev opposite side of the intake manifold which in turn communicates with a passageway 19 formed in the exhaust manifold and which leads to the exhaust pipe 13. An .upwardly is integrally formed on the top side ofthe manifold 6 which is in registry with a continuing portion 21 of the exhaust manifold.

A valve in the form of with trunnions 23 and 24 on opposite ends thereof which are journaled in bearings formed in end walls 25 and 26, Inner and outer side walls 27 and 28 are provided which together with the end walls form the passageway leading down and aroundV the intake manifold.

The details of construction oftliis valve and mounting means therefor are described and shown in detail in my co-peiiding application Serial August 7,1930.

- The trunnion 23 is 'connected by a collar v29 to va. co-axially extending shaft 30, the Vopposite end of which is connected by a collar of a shaft 33 of a Number 473,706, :tiled thermo-responsive unit.

Yielding means is provided for normally urging the valve 22 to a closed position-as shown in full lines in Fig. 5 of the drawings and comprises a helical torsion spring 34 which surrounds the collar 31. One end of the spring 34 is anchored to a flange 35 rigidly secured to the shaft 30 by a pin 36, and the other end of the spring is turned outwardly .to engage back of a lug 37 which is struck the lug 41 so as to be spaced a fui-ther distance from the axial center of the shaft Means are provided for engaging the lugs r41 and 42 so as to releasably lock the shaft v33 and comprises a depending hook 43 integrally formed at the outer end of an arm 44 which is pinned to a shaft 45. The opposite ends of the shaft 45 protrude from the sides of the arm 44 and are j ournaled in axially registering apertures formed inthe end wall 38 and a sub-wall 46.

The depending hook 43 is positioned in the `path of travel of the lugs v41 and 42 soas to normally engage back of said lugs when the an elongated rectangular relatively fiat body `22 is provided integrally formed nsenvcs segment is rotated in a left hand direction as 'viewed in Fig. 2 of the drawings. The segment 39 is also provided with a radially extending arin 47 which abuts against the inner end of an adjusting screw 48 fitted in the front wall 49 of the housing which surrounds the thermo-responsive unit. -A lock nut 50 is provided on the adjusting screw 48 for securing it in adjusted position, the screw 48 being arranged so as to position the valve 22 in fully closed position when rotated by the torsion spring 34.

Means are provided for releasing the hook 43 from engagement with the lug 41 and com prises a thermo-responsive element suchas a bellows 51, which is mounted partially within the intake manifold 6 so as to be controlled by the temperature within said intake manifold; The bellows 51 is connectedY through a suitable rod'52 to the outer end 53 of arm: 44

so that expansion of the bellows will move the rod 52 upwardly and raise Ithe hook 43 sufficiently to release it from the lugs 41 and 42. c

Means are provided for manually moving the valve 22 to an open position and comprises a rod 54, one end of which terniinatesat the vehicle dash, and the other end of which is connected to an arm 55 secured to the shaft 30. A link 56 connects the arm 55 with an arm 57 which controls the mixture enriching device of the `carburetor 9. j

Such mixture enriching device may be the wellknown choke valve or other type of more 'modern enriching vdevice in which asupplemental supply of gasoline is introduced into the carburetor for the purpose ofstarting the motorwhen cold. l W i In the operation of this device suitable tension is placed on thespring 34 to rotate the valve 22 toward a closed position. Thescrew' 48 is adjusted so asto position the valve 22 in fully closed position as shown in full lines in Fig. 5 of the drawings. When the motor is cold it is a universal custom to pull out on the dashcontrol for closing the choke valve oi" actuating some other form ofv mixture enriching device.

Such manual operation ofthe rod 54 will not only through the link 56 and 57, but will also rotate the shaft 30 so as to move the segment 39 in a left-hand direction until the lug 41 is engaged back of the hook 43, at which point it -is releasably locked against the action of the torsion spring. n

TWhen in this position, the valve 22 is in full open positionpthus causing all of the exhaust gases from the header 10 of the exhaust manifold to pass down through the passageways 15 and 16, underneath j thel intake manifold through the passageways 17 which are at each side of the riser 8, upwardly through the passageways 18 and 19, and thence out through the exhaust pipe 13.

Passage of the exhaust gases around the actuate the mixture enriching devicel lit) intake manifold will quickly heat the manifold at the point where it joins the riser so as to raise the temperature of the incoming gases from the carburetor, which rise` in temperature will facilitate their combustion within the internal combustion motor.

When the temperature of the incoming fuel lnixture has Vbeen raised to a predetermined Y Y ter of the shaft 33 than the lug 41 and will thus engage the hook 43 after said hook has been lifted a distance suilicient to release it from engagement with the lug 41. Whenthe hook 43 engages the lug 42, the valve 22 will be in partially closed position as shown in dotted outline in Figf, thus directing part of the exhaust gases down around the intake manifold and permitting the remainder thereof to pass directly out through the exhaust pipe 13.

When the temperature of the intake mixture is further raised to a predetermined degrec, the bellows 51 will be further expanded sufficiently to disengage the hook 43 from the lug 42. Such release permits the torsion spring 34 to further rotate the shaft 30 and valve 22'until the arm 47 comes in contact with the end of the adjusting screw 48, at which time the valve 22 will be in fully closed positionas shown in full lines in Fig. 5 of the drawings.

Under certain conditions such as extremely cold weather, the valve 22 may remain in partially closed position or even in full open position, depending upon the temperature of the fuel mixture.

Although but one specific embodiment of this invention has been herein shown and described, it will be understood that numerous details of the construction shown may be altered or omitted without departing from the spirit of this invention as defined by the following claims.

W'hat I claim is: Y

1. In an internal combustion motor, the combination of an intake manifold, an exhaust manifold having a passageway leading to a wall of said intake manifold, a valve for controlling the passage of exhaust gases through said passageway, manually operable means for moving said valve to an open position for directing exhaust gases into contact with said intake manifold, yielding means normally urging said valve to a closed position, locking means for releasably securing said valve in open position, thermo-responsive means for releasing said looking means, and means for releasably securing said valve in a partially closed position, said thermo-responsive means being adapted to release said locking means at partially closed position so as to permit said yielding means to fully close said valve.

`2. In an internal lcombustion motor, the combination of an intake manifold, an` exhaust manifold havingV a passageway leading to a wall of said intake manifold, a valve for controlling the 'passage of exhaust gases through said passageway, manually operable means for moving said valve to an open p'osition for directing exhaust gases intojconmeans normally urging said valve toa close so y vtact with said `intake manifold, yieldin 'i position, locking means for releasably securl ing said valve in open position, means responsive to the temperature insald intake manifold .for releasing said locking means,

and means for releasably securing said'valve in4 a partially closed position, said thermoresponsive means being adapted to release said locking means at partially closed position so as to permit said yielding means to fully close said valve.

FLOYD F. KIsHLINE. i'

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